Acid-proof composition.



UNITED STATES Patented June 28, 1904.

FREDERICK AUGUSTA PANK, OF BUTTE, MONTANA.

ACID-PROOF COMPOSITION.

SPECIFICATION formingpart of Letters Patent No. 763,421, dated June 28,1904.

Application filed September 9, 1903. Serial No. 172, 293. (Nospecimens.) I

To all whom it may concern.-

Be it known that I, FREDERICK AUGUSTA PANK, a subject of the King ofGreat'Britain, and a resident of Butte, in the county of Silverbow andState of Montana, have invented a new and useful Acid-Proof Compositionto be Used for Coating Iron Pipes, of which the following is a full,clear, and exact description.

My invention relates to a composition of matter, the same being a kindof waterproof and acid-proof paint.

This composition or paint when applied to iron pipes used in thecopper-mining industry will prevent the corrosion of such pipes by theacids normally contained in the copper water. It has heretofore beennecessary to line such pipes with Wood; but the expensive and cumbersomelining of wood may be dispensed with if the pipes have been properlycoated with my composition. My composition admits of general use,however, and is by no means limited in its application to pipes of thiskind, being suitable for use in building, marine, naval, and otherconstruction work, and to prevent corrosion of iron and steel generally.

The composition is made as follows: First, I take one gallon of boiledlinseed-oil, applying heat thereto and, stirring the oil constantly, Iadd and dissolve eight ounces of india-rubber therein; second, Idissolve four ounces of resin; third, I dissolve ten ounces offinely-cut beeswax; fourth, I add three pounds of powdered silica;fifth, I dissolve two pounds of red lead; sixth, I add three pounds ofpowdered gypsum. The mixture is maintained all the while just at theboiling-point and is constantly stirred. The fourth and fifth steps maybe consolidated by adding the silica and red lead at the same time but Ifind that the results are more satisfactory if they are addedseparately.

More satisfactory results are obtained if the composition be appliedwhile hot.

Having thus described myinvention, I claim as'new and desire to secureby Letters Patent 1. The herein described composition of matter,consisting of linseed-oil, indiarubber, resin, beeswax, silica, redlead, and gypsum.

2. The herein described composition of matter, comprising substances inthe following proportions,.to Wit: one gallon linseed-oil, eight ouncesindia-rubber, four ounces resin, ten ounces beeswax, three poundssilica, two pounds red lead, and three pounds of gypsum.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

FREDERICK AUGUSTA PANK.

Witnesses:

WILLIAM F. DAVIS, LEWIS J. DUNCAN.

